ignore env and vim undo
Add dependencies
Got everything working on tornado instance.

  The right thing is probably to split the processes and use a proper queue though.
  Using callbacks in a single threaded event loop to do the work probably isn't a good idea.
  It's not biting us here because we're just passing events around rather than doing
  anything expensive like number crunching or IO. Might be a decnt trick to get
  something up on heroku for free with bg procecessing though.